Leaf Pack Experiment Details at Lower Wenatchee River
Placement Information

Placement Date April 6, 2023
Number of Packs Placed 1
Placement Air Temperature Unknown °C
Placement Water Temperature 7.3 °C
Stream Habitat Type Run
Leaf Pack Type and Composition

Predominant Leaf Species:

willow spp.
black cottonwood
siberian elm (invasive)


Retrieval Information

Retrieval Date May 1, 2023
Number of Packs Retrieved 1
Retrieval Air Temperature Unknown °C
Retrieval Water Temperature 8.2 °C
Storm and Non-Storm Events

Did storms occur while your leaf packs were in the stream? Unknown
Did flooding occur? Yes
Was this site experiencing a drought during your experiment? Unknown

Summary Analysis
Results Overview

Total Number of Individuals Found 16
Pollution Tolerance Index Score 9
Pollution Tolerance Index Rating Poor - Severe pollution likely
Percent EPT 37.50%